Adhesive composition



Patented May 26, 1931 UNITED STATES PATENT OFEHIE RALPH W. LANE, F CANTON, MASSACHUSETTS ASSIGNOR TO THE HAINES CORPORA- TION, 0F BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS ADHESIVE COMPOSITION .N'o Drawing.

a thoroughly satisfactory adhesive backing which will have a long life under any or all of these conditions, and which is capable of withstanding a complete change, in these condltions, such as from a moist to a dry atmosphere, Other adhesive compositions have been unsatisfactory because they tend to dry, or become too soft, or fail to stick hard enough to the surface to which they have been applied and are limited to a comparatively short life of a few months.

It is an object of this invention to provide a composition which will be waterproof, and

capable of withstandingchanges in the conditionssum-minding itsuse and'wlnch will I maintain its adhesive qualities over a long period of time.

I attain these objects by a novel composition of which latex and rubber, soft copal,

rosin and gutta-percha or any gum together.

with a filler, constitute the preferred principal. ingredients. A- 'wo'rkable composition may be obtained even though the proportions of the ingredients are greatly changed or equivalent substances substituted therefor,

: and even if one or more are entirelyomitted.

For .examplea workable composition will be obtained if latex alone is used, without any rubber, although III the preferred form of my invention Iemployalarge proportion of sheet rubber and of a tacky rubber in addition to latex.

In forming my composition I first reduce the solid ingredients, by passing them between the rolls of a masticator. The resulting doughy material is cut. into strips and dissolved by means of any solvent suitable for that purpose. After this mixture has been churned for some time I add the latex and continue churning the mixture for a time thereafter. The composition thus obtained Application filed J 'uIy 8, 1929. Serial No. 378,868.

may be kept indefinitely without separating. In case it hardens after standing it may readily be brought back to a proper condition for application by adding a small proportion of solvent.

In the preferred form of my invention I have found it desirable as stated above to use a proportion of a rubber having an especially tacky character in addition to the ordinary rubber employed. 'Any reclaimed rubber is suitable for this use. 'l/Vhile the proportions of ordinary rubber, latex, and a tacky rubber may be varied greatly I prefer to use them in about the following proportions:

Latex from about 5 to Ordinary rubber from about 17 to Tacky rubber from about 3 to 12% In place'of copal, a workable composition may be obtained by substituting another resin but I prefer to use a soft copal such for example as thatknown as Manilla copal. Any gum may be used but I prefer to useg'utta' percha or any of its allied gums. In addition it may be desirable to use a small amount of resin, such.as B'urgundy'pitch. I prefer to use these ingredients in the following proper tionsz' Copal from about 3 to 10% Guttapercha from about (3 to 25% Burgundy pitch from about 1 to 5" I prefer to use:

Zinc oxide from about 6 to 25% Lithopone from about 3 to 18% The composition described herein when applied on silk or cotton labels for example,

will cause the labels to stick harder and last lon er than has heretofore been ossible. In ad 'tion the label will be impervious to water or steam.

5 In a plying a label with my adhesive backing although a lesser heat will serve to aflix the label the best results will be obtained if the label is exposed to a heat approximately equal to that of boiling water or greater.

In the following claims, I have defined my invention in terms of its solid constituents without the addition of any solvent. It will be readily understood in the art that a suflicient proportion of solvent may be used as required to reduce the solids.

What I claim is:

1. An adhesive composition comprising:

Latex from about 5 to 15% Rubber from about 20 to 52% Resin from about 3 to 10% A filler from about 6 to Gum from about 6to25% 25 2. An adhesive composition comprising:

Latex from about 5 to 15% Rubber from about 20 to 52% Rosin from about 1 to 5% Resin from about 3 to 10% 80 A filler from about 6 to 25% Coloring matter from about 3 to 18% Gum from about 6 to 25% 3. An adhesive composition containing constituents in about the following proportions:

Latex from about 5 to 15% Rubber from about 20 to 52% Rosin from about 1 to 5% 40 Co al from about 3 to 10% A ller from about 6 to 25% Coloring matter fromabout 3 to18% Gum from about 6 to 25% 4. An adhesive composition containing constituents in about the following proportions:

Latex from about 5 to 15% Rubber from about 17 to 40% 5o Rosin from about 1 to 5% Any tacky rubber from about 3 to 12% Soft copal from about 3 to 10% Zinc oxide from about 6 to 25% Lithopone from about 3 to 18% Gutta-percha from about 6 to 25% In testimony whereof I aflix my signature.

' RALPH W. LANE. 

